Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 202-476-7 | CAS number: 96-09-3
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Data from an OECD guideline study 202 on Daphnia magna are available.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 13 mg/L
Additional information
Freshwater invertebrates
In the study performed according to the OECD Guideline 202 (April 13, 2004) the 48h acute toxicity of styrene oxide to Daphnia magna was studied under semi-static conditions. Daphnids were exposed to control, reference control, and test substance for 24 and 48 hours. Initial concentrations at 10, 22, 46 and 100 % of the WSF slightly decreased during the renewal periods (58-89 % of initial). Given these results, effect parameters were based on the average exposure concentrations that were calculated to be 4.3, 11, 20 and 47 mg/L.
Immobilization was observed at test termination. The 48h-EC50 of styrene oxide was 13 mg/L based on average exposure concentrations (95 % confidence interval between 12 and 16 mg/L).
Marine water invertebrates
No data available
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
